Commitments And Contingencies - Schedule Of Product Warranty Liability (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 32	$ 37	$ 35	$ 37
Warranty expense (income) recognized	(2)	2	(4)	3
Warranty credits issued	(1)	(2)	(2)	(3)
Balance at end of period	$ 29	$ 37	$ 29	$ 37